The news comes after a wrongful death suit filed by the parents of a 14-year-old girl from Hagerstown, Md., who died after she drank two 24-ounce beverages in 24 hours.

An autopsy found that the girl died of cardiac arrhythmia due to caffeine toxicity, and noted that she suffered from an inherited disorder that can weaken blood vessels.

FDA spokeswoman Shelly Burgess says although the young girl's death was linked to a high amount of caffeine, this doesn't prove that the drinks cause deaths.

Monster Beverage Corp. puts labels on cans that state that the Monster energy drinks are not recommended for children and people who are sensitive to caffeine. The company said it's "unaware of any fatality anywhere that has been caused by its drinks."

Dr. Robert Biederman, a cardiologist at Allegheny General Hospital, warns about the potential dangers of highly caffeinated energy drinks like Monster.

"In moderation, like most drugs, this is not a problem. But to the extent like this lady took, or like others took who may have underlying cardiac disease, it can be very dangerous, if not fatal," Biederman said.

Biederman also advises regulating the amount of caffeine taken, saying, "The average amount of caffeine in a Coke is roughly about 45-50 mg. In my understanding, this lady took at least 24 ounces of Monster, which is just in excess of 240 mg of caffeine, and that's at least 2 1/2 to 3 times the amount of caffeine that's in one cup of coffee."

Although caffeine is not an FDA-regulated drug, Biederman said it is addictive and generally isn't advised for those younger than 14, or patients who are also taking narcotics medications, or mixing it with alcohol.

The Obama administration will unveil a major climate change plan Monday aimed at a large reduction in greenhouse gas emissions from the nation's coal-burning power plants, a senior administration official told CNN.